I would like to extend and customize an app built from a sample from the ESRI AppStuio for ArcGIS GitHub on the AppStudio for ArcGIS (Desktop Edition) program on my desktop computer.
A few questions for your advice and suggestions:
1. What development skills should I have? Qt, Java, .Net or C++.
2. As not all the potential users in my organization have an ArcGIS Online login (and they are not going to have one), how can I make the App avaiable for them? What if I can make all the feature services and web maps used in the App public accessible (shared with public)?
3. Do I need a Standard level license to be able to upload the customized App to ArcGIS Online so that I can build it there for distribution?